Explanation of no temperature uniformity parameter for vacuum drying oven
The general electric blast drying ovens are equipped with temperature uniformity parameters: the natural convection drying oven is the upper limit of the working temperature multiplied by 3%, and the forced convection drying oven is the upper limit of the working temperature multiplied by 2.5%. The vacuum drying oven does not have a temperature uniformity parameter. Why is this? The possibility of the gas temperature in the vacuum drying chamber to make the temperature of the working chamber uniform is almost gone. Therefore, from the conceptual point of view, we can no longer use the temperature uniformity definition specified in the usual electric blast drying oven to the vacuum drying oven. It is also meaningless to set this indicator under vacuum. The amount of thermal radiation is inversely proportional to the square of the distance. For the same object, the radiant heat received at 20 cm from the heated wall is only 1/4 of 10 cm from the heated wall. big difference. This phenomenon is warm when the sun is shining in the winter, and the sun is not warm. It is a truth that the sun is not cold. Since the vacuum drying oven is difficult to make the radiant heat of each point in the three-dimensional space of the studio uniform and lacks an authoritative evaluation method, it may be that the vacuum drying box standard does not have a temperature uniformity parameter. the reason.
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